> Suprisingly, there is no connection between the entity IRIs and the wikipage > URLs. If one was given the IRI of an entity from Wikidata, and had no further > information about how Wikidata works, they would not be able to retrieve HTML > content about the entity.
If you require the "text/html" MIME type, you are going to be redirected to the HTML content. For example, you could try to go to https://www.wikidata.org/entity/Q42 using your favorite browser or execute: curl --header 'Accept: text/html' https://www.wikidata.org/wiki/Special:EntityData/Q42 -v Cheers, Thomas > Le 1 mai 2018 à 10:03, Antoine Zimmermann <antoine.zimmerm...@emse.fr> a > écrit : > > On 01/05/2018 03:25, Peter F. Patel-Schneider wrote: >> As far as I can tell real IRIs for Wikidata are https URIs. The http IRIs >> redirect to https IRIs. > > That's right. > >> As far as I can tell no content negotiation is >> done. > > No, you're mistaken. Your tried the URL of a wikipage in your curl command. > Those are for human consumption, thus not available in turtle. > > The "real IRIs" of Wikidata entities are like this: > https://www.wikidata.org/entity/Q{NUMBER} > > However, they 303 redirect to > https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER} > > which is the identifier of a schema:Dataset. Then, if you HTTP GET these > URIs, you can content negotiate them to JSON > (https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER}.json) or to > turtle (https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER}.ttl). > > > Suprisingly, there is no connection between the entity IRIs and the wikipage > URLs. If one was given the IRI of an entity from Wikidata, and had no further > information about how Wikidata works, they would not be able to retrieve HTML > content about the entity. > > > BTW, I'm not sure the implementation of content negotiation in Wikidata is > correct because the server does not tell me the format of the resource to > which it redirects (as opposed to what DBpedia does, for instance). > > > --AZ > >> peter >> idefix merging> curl -I http://www.wikidata.org/wiki/Q52000000 >> HTTP/1.1 301 TLS Redirect >> Date: Tue, 01 May 2018 01:13:09 GMT >> Server: Varnish >> X-Varnish: 227838359 >> X-Cache: cp1068 int >> X-Cache-Status: int-front >> Set-Cookie: WMF-Last-Access=01-May-2018;Path=/;HttpOnly;secure;Expires=Sat, >> 02 >> Jun 2018 00:00:00 GMT >> Set-Cookie: >> WMF-Last-Access-Global=01-May-2018;Path=/;Domain=.wikidata.org;HttpOnly;secure;Expires=Sat, >> 02 Jun 2018 00:00:00 GMT >> X-Client-IP: 199.4.160.88 >> Location: https://www.wikidata.org/wiki/Q52000000 >> Content-Length: 0 >> Connection: keep-alive >> idefix merging> curl -I https://www.wikidata.org/wiki/Q52000000 >> HTTP/2 200 >> date: Tue, 01 May 2018 01:14:58 GMT >> content-type: text/html; charset=UTF-8 >> server: mw1252.eqiad.wmnet >> x-content-type-options: nosniff >> p3p: CP="This is not a P3P policy! See >> https://www.wikidata.org/wiki/Special:CentralAutoLogin/P3P for more info." >> x-powered-by: HHVM/3.18.6-dev >> content-language: en >> link: </static/images/project-logos/wikidatawiki.png>;rel=preload;as=image >> vary: Accept-Encoding,Cookie,Authorization >> x-ua-compatible: IE=Edge >> backend-timing: D=75094 t=1525107829593021 >> x-varnish: 754403290 624210434, 194797954 924438274 >> via: 1.1 varnish (Varnish/5.1), 1.1 varnish (Varnish/5.1) >> age: 29467 >> x-cache: cp1067 hit/8, cp1068 hit/9 >> x-cache-status: hit-front >> set-cookie: CP=H2; Path=/; secure >> strict-transport-security: max-age=106384710; includeSubDomains; preload >> set-cookie: WMF-Last-Access=01-May-2018;Path=/;HttpOnly;secure;Expires=Sat, >> 02 >> Jun 2018 00:00:00 GMT >> set-cookie: >> WMF-Last-Access-Global=01-May-2018;Path=/;Domain=.wikidata.org;HttpOnly;secure;Expires=Sat, >> 02 Jun 2018 00:00:00 GMT >> x-analytics: ns=0;page_id=52899665;https=1;nocookies=1 >> x-client-ip: 199.4.160.88 >> cache-control: private, s-maxage=0, max-age=0, must-revalidate >> set-cookie: GeoIP=US:MA:Woburn:42.49:-71.16:v4; Path=/; secure; >> Domain=.wikidata.org >> accept-ranges: bytes >> idefix merging> curl -I -H "Accept: text/turtle" >> https://www.wikidata.org/wiki/Q52000000 >> HTTP/2 200 >> date: Tue, 01 May 2018 01:15:52 GMT >> content-type: text/html; charset=UTF-8 >> server: mw1252.eqiad.wmnet >> x-content-type-options: nosniff >> p3p: CP="This is not a P3P policy! See >> https://www.wikidata.org/wiki/Special:CentralAutoLogin/P3P for more info." >> x-powered-by: HHVM/3.18.6-dev >> content-language: en >> link: </static/images/project-logos/wikidatawiki.png>;rel=preload;as=image >> vary: Accept-Encoding,Cookie,Authorization >> x-ua-compatible: IE=Edge >> backend-timing: D=75094 t=1525107829593021 >> x-varnish: 754403290 624210434, 160015159 924438274 >> via: 1.1 varnish (Varnish/5.1), 1.1 varnish (Varnish/5.1) >> age: 29522 >> x-cache: cp1067 hit/8, cp1068 hit/10 >> x-cache-status: hit-front >> set-cookie: CP=H2; Path=/; secure >> strict-transport-security: max-age=106384710; includeSubDomains; preload >> set-cookie: WMF-Last-Access=01-May-2018;Path=/;HttpOnly;secure;Expires=Sat, >> 02 >> Jun 2018 00:00:00 GMT >> set-cookie: >> WMF-Last-Access-Global=01-May-2018;Path=/;Domain=.wikidata.org;HttpOnly;secure;Expires=Sat, >> 02 Jun 2018 00:00:00 GMT >> x-analytics: ns=0;page_id=52899665;https=1;nocookies=1 >> x-client-ip: 199.4.160.88 >> cache-control: private, s-maxage=0, max-age=0, must-revalidate >> set-cookie: GeoIP=US:MA:Woburn:42.49:-71.16:v4; Path=/; secure; >> Domain=.wikidata.org >> accept-ranges: bytes >> On 04/30/2018 02:53 PM, Lucas Werkmeister wrote: >>> The real URI (without scare quotes :) ) is not >>> https://www.wikidata.org/wiki/Q52000000 but >>> http://www.wikidata.org/entity/Q52000000 – and depending on your Accept >>> header, that will redirect you to the wiki page, JSON dump, or RDF data >>> (in XML or Turtle formats). Since the LOD Cloud criteria explicitly >>> mentions content negotiation, I think we’re good :) >>> >>> Cheers, >>> Lucas >>> >>> On 30.04.2018 23:08, Peter F. Patel-Schneider wrote: >>>> Does it? The point is not just that Wikidata has real pointers to external >>>> resources. >>>> >>>> >>>> Wikidata needs to serve RDF (e.g., in Turtle) in an accepted fashion. Is >>>> having https://www.wikidata.org/wiki/Special:EntityData/Q52000000.ttl >>>> available and linked to with an alternate link count when the "real" URI is >>>> https://www.wikidata.org/wiki/Q52000000? I don't know enough about this >>>> corner of web standards to know. >>>> >>>> >>>> peter >>>> >>>> >>>> >>>> >>>> >>>> >>>> On 04/30/2018 01:45 PM, Federico Leva (Nemo) wrote: >>>>> Peter F. Patel-Schneider, 30/04/2018 23:32: >>>>>> Does the way that Wikidata serves RDF >>>>>> (https://www.wikidata.org/wiki/Special:EntityData/Q52000000.rdf) satisfy >>>>>> this >>>>>> requirement? >>>>> I think that part was already settled with: >>>>> https://lists.wikimedia.org/pipermail/wikidata/2017-October/011314.html >>>>> >>>>> More information: >>>>> https://phabricator.wikimedia.org/T85444 >>>>> >>>>> Federico >>>> >>>> _______________________________________________ >>>> Wikidata mailing list >>>> Wikidata@lists.wikimedia.org >>>> https://lists.wikimedia.org/mailman/listinfo/wikidata >>>> >>> _______________________________________________ >>> Wikidata mailing list >>> Wikidata@lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/wikidata >> _______________________________________________ >> Wikidata mailing list >> Wikidata@lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/wikidata > > > _______________________________________________ > Wikidata mailing list > Wikidata@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikidata _______________________________________________ Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
